Author Topic: Need help on wireless composite signal transmission (Read 1023 times)

Pulse · « **on:** November 26, 2009, 08:33:08 AM »

tinatry ko po sanang makagawa ng circuit wherein matatransmit ko yung composite video signal coming from dvd/vcd players, PCs etc., via wireless transmission. meron po ba kayong tips/suggestions para magawa ko po sya? or any sample circuit design na available?

Philippine Electronics Forum · « **on:** November 26, 2009, 08:33:08 AM »

Shey · « **Reply #1 on:** November 26, 2009, 09:27:23 AM »

See the pdf file below.. you can use the LM2889 RF Modulator chip and add an RF Amplifier circuit..

http://www.national.com/an/AN/AN-402.pdf

meron ng mga bagong RF Modulator chips ngayon but i am not familiar kung anong IC ang gamit nila.. you can go to DIY and buy an rf-modulator ( around 700 pesos ) tapos reverse engineer mo na lang or add an RF-Amplifier sa RF Ouput pin niya..

sample RF amps you can attach on RF-modulators..

Philippine Electronics Forum · « **Reply #1 on:** November 26, 2009, 09:27:23 AM »

Pulse · « **Reply #2 on:** November 26, 2009, 10:16:40 AM »

thanks po sa quick reply, bali yung RF out po ba ikakabit sya sa isang RF transmitter or antenna nalang? karamihan po kasi sa mga nabasa ko na video transmission eh may specific channel na sya sa TV mag output. balak ko po kasi sana na may receiver tapos yun yung ikakabit sa rca yellow ng TV.

Philippine Electronics Forum · « **Reply #2 on:** November 26, 2009, 10:16:40 AM »

jikar7189 · « **Reply #3 on:** February 09, 2012, 07:59:49 PM »

You can also use MC1374 TV moulator IC ..may specs dn yan , hanapin mo lang s google.. just connect an antenna in RFout.. you can view it in channel 3 or 4, pwidi mo rin imodify san channel gusto mo but you have to consider the NTC law/rules ..

Philippine Electronics Forum · « **Reply #3 on:** February 09, 2012, 07:59:49 PM »

insomartin · « **Reply #4 on:** February 09, 2012, 09:59:36 PM »

Quote from: jikar7189 on February 09, 2012, 07:59:49 PM

You can also use MC1374 TV moulator IC ..may specs dn yan , hanapin mo lang s google.. just connect an antenna in RFout.. you can view it in channel 3 or 4, pwidi mo rin imodify san channel gusto mo but you have to consider the NTC law/rules ..

i concur

Philippine Electronics Forum · « **Reply #4 on:** February 09, 2012, 09:59:36 PM »

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